Figure 5-5.Water-cooled panel assembly.
assemblies. Orifices, located at the discharge pipe
tube connection, control the flow of water through
the module assemblies. The continuous circulation
of water dissipates the heat absorbed by the module
from the aircraft exhaust.
The ships fire main system supplies salt water to
the JBD cooling system. An in-line strainer filters
out particles that could clog the water passages of
the module assemblies. The salt water, under 90 psi
minimum pressure, enters the inlet pipe of each
panel base assembly through a swivel joint and
saltwater hose connection (see fig. 5-5, detail A) and
then into each of the module assemblies. The salt
water exits through the discharge pipe at the
opposite side of the panel assembly and out through
another hose connection into the saltwater discharge
overboard piping (fig. 5-6).
The catapult main hydraulic system supplies
hydraulic fluid to the JBD hydraulic system. This
catapult main hydraulic pressure is directed to three
four-way control valves. The four-way valves control
the flow of hydraulic fluid to and from the JBD
hydraulic cylinders (see fig. 5-7). Each four-way
control valve assembly consists of a subplate,
sequenece valve, pilot operated control valve, and a
direct solenoid-operated control valve.